I put this into a reeeaaallly cheap Squire 10watt amp. Much better than the stock speaker and it was a direct fit. Good set up when you live in an apartment.

I picked up two of these to put in a used Roland Cube Street that I bought for busking. There was nothing "wrong" with the original Roland speakers, but I was looking for any kind of sonic upgrade I could get. I'd originally tried a couple of Eminence 620H speakers I had on hand and they did sound a bit better, but I was hesitant to drop $100+ worth of hemp cone speakers into a used 2.5 watt per channel amp. I'll save the Eminence speakers for a better use. So I ordered a pair of the Jensen MOD 6-15 speakers at 4 ohms. They dropped right in, no problem. I do think they sound better and two of them cost less than one of the Eminence. That's not a knock on the Eminence 620H; it's a great speaker, if a bit pricey. I like these Jensen MODS in the Cube Street. Of course I don't have any hard technical data, no measurements, but to my ears the sound is smoother, perhaps a bit louder and fuller. They sound a bit less strident than the original Roland speakers. There might be a bit more low end with the Jensen MODS, but I'm thinking that's basically restricted by the voicing of the Roland Cube Street itself. Again, I don't have any measurements, haven't seen a schematic, but I think the Cube Street is a bit bass shy and probably for design reasons. It just makes sense to voice it to use batteries, a 2.5 watt amp and 6.5" speakers. Less low end requires less power, batteries last longer. Then again, my opinion. Bottom line, I think the speaker upgrade to my Cube Street was worth the money, sounds better to my ears. I played backing tracks and my humbucker, hollow body jazz box through the amp and the speakers held up to those Flatwound 12 strings, nice and full. Yea, I'm happy.

It sounds amazing in my orange amp

Put this in one of my two identical Fender Champion 600s and A/B'd them against each other. At first, the difference was marginal. But... After using my looper to play guitar through the speaker at high volume for eight or more hours, the difference was palpable.
The lows are much tighter and less flabby, and the high notes or more distinct and clear.
Great improvement over stock!

Used the Mod 6-15 speaker to replace the factory speaker in my Fender Champ 600. What a huge improvement. I would also suggest changing the factory grill cloth when you change the speaker for an even greater sound improvement.

Same here. I bought the Mod6-15 Jensen to replace the crappy speaker that comes with the Fender 600 champion. Great improvement. The shipping was also very fast. I will purchase here again.